The problem is larger than just us. Martians would be well advised to shoot any members of our species that show up on their planet to keep the infection from spreading.
I have a different take.
tRUMP, always looking for adulation and people he could control, and to prove to the world how powerful he is, might invite the aliens to the White House for dinner - but only if they promised to serve him well.
After he introduced his sycophantic Republican invitees to the aliens, tRUMP left them in the dining room and went with the aliens to another part of the White House.
After sitting at the dinner table for a while, wondering where tRUMP and the aliens were, imagine the attendee's shock when the aliens finally reappeared - with tRUMP naked on a YUUUUUUGE silver platter, with a large apple stuffed into his big mouth.
On their way to Earth, the aliens had read about and studied tRUMP, and his likes and dislikes including food - and, after all, they had agreed to serve him.
And they did serve him - well.
As in well-done, just how tRUMP liked his steaks served to him. *
Idea stolen from "Twilight Zone's" episode 89, "How to Serve Man."
I'm all for a wall, from Eureka California to Eureka Montana!